Cisco Cisco Email Security Appliance C170 기술 참조

Configure settings for Bounce Verification. Use this command to configure keys 
and invalid bounced emails.

Commit: This command requires a ‘commit’.

mail3.example.com> bouncerecipients

Please select how you would like to bounce messages:

1. By recipient host.

2. By Envelope From address.

3. All.

[1]> 

Are you sure you want to bounce all messages in the queue? [N]> Y

Bouncing messages, please wait.

1000 messages bounced.